Illuminated keyboard with a light guide plate

Details Illuminated keyboard with a light guide plate Illuminated keyboard with a light guide plate

2011-05-10

2011-05-10

Friedhofer, Michael A (Department: 2833)

Electricity: circuit makers and breakers

Electric switch details

Indicators

C200S314000, C200S317000

Reexamination Certificate

active

07939773

ABSTRACT:
An illuminated keyboard with a light guide plate of the present invention includes a key module and a luminous module located under the key module. The luminous module includes a transparent light guide plate, a plurality of illuminants, and a light reflection plate located under the light guide plate. The light guide plate is provided with a plurality of light input units which are sections formed at the light guide plate. The illuminants are located corresponding to the light input units, and the light emitted by the illuminants is transmitted into the light guide plate via the sections. The light guide plate is provided with a plurality of light output units to provide the light to the key module. Each light output unit is provided with a plurality of light output members. The quantity of the light output members of each light output unit located at the same side of the illuminants increases with the increasing distance between the light output units and the illuminants. The light emitted from the illuminants to the light input units of the light guide plate, transmitted through the light guide plate and refracted or scattered at the light output units. The quantity and structure of the light output members of each light output unit and the position of the light output units can be adjusted according to the requirements, thereby providing even and bright light to the key module.

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